I love mug cake recipes! I have many of them already, such as my vegan vanilla mug cake, matcha mug cake, or Oreo mug cake. I love the simplicity of whipping a few ingredients, baking in my microwave or air fryer, and getting a single-serve cake to enjoy. My kids can also make these mug cakes recipes by themselves and it’s so rewarding for them. Let’s see how to make this healthy mug cake with oats, a variation of my popular Healthy Mug Cake.
Ingredients and Substitutions
All you need to make this easy oat mug cake are:
Oat Flour – You can also use all-purpose flour. It gives the mug cake a texture closer to real cakes, but I find oat flour healthier and love the flavor. Quick Oats or rolled oats. I like quick oats with oat flour. Together, they bind better and create a delicious cake texture, less fragile than with old-fashioned rolled oats. Avocado Oil or mashed banana or applesauce for an oil-free option. Almond Butter or peanut butter, or tahini. Unsweetened Almond Milk or oat milk, soy milk, or any plant-based milk. Maple Syrup or any liquid sweetener you love, including coconut nectar or agave syrup. Baking Powder – for the fluffy texture. Vanilla Extract – for even more flavor.
Optional Add-Ons
Feel free to stir in some of the below ingredients in the mug cake batter before cooking.
1-2 tablespoons of chocolate chips – I use plant-based chocolate chips. Unsweetened shredded coconut Chopped nuts (peanuts or pecan nuts).
How To Make Oatmeal Mug Cake
It’s easy to make this Oat mug cake recipe for a quick healthy snack. Let me show you how.
Choice of Flour For Texture
This mug cake won’t rise much, and the crumb is a bit crumbly if you use oat flour. This is because the recipe contains no gluten. If you use all-purpose flour, the cake rises more, and the texture is more bouncy and compact, like a real cake or muffin.
Serving
You can serve this mug cake plain or with some delicious toppings like:
A drizzle of maple syrup Vegan dark chocolate chips Fresh or frozen berries like blueberries, raspberries or strawberries Unsweetened coconut whipped cream Chopped nuts Coconut yogurt
Storage Instructions
You can’t store mug cakes cooked in the microwave for more than one hour. After that time, their taste and texture change, and it’s not very good. You can eventually mix the dry ingredients the day before and store them in a sealed mason jar in the pantry. For the liquid ingredients, mix and store them in the fridge. The next day, assemble the ingredients and microwave just before eating.
Allergy Swaps
Below are some allergy swap ideas to adapt this healthy mug cake recipe to your dietary requirements.
Oil-Free – You can replace oil with the same amount of mashed bananas, dairy-free yogurt, apple sauce, or mashed sweet potato puree. Sugar-Free – You can replace the maple syrup with natural sugar-free sweeteners like Monk fruit-based syrup. Gluten-Free – Pick a gluten-free certified oat brand and make homemade oat flour. Nut-Free – Use soy milk, oat milk, or hemp milk. Also, swap the almond butter for sunflower seed butter or tahini.
Below are the answers to your most common questions about this oat mug cake recipe.
More Healthy Mug Cake Recipes
If you like vegan mug cakes, you’ll love these other recipes:
